A recent article from New Scientist explores the science-backed ways to get fit as fast as possible. The piece highlights that anyone starting to exercise more than they are used to will see improvements surprisingly quickly, regardless of the workout they choose. The key to improving fitness is to exceed one's "habitual load," or in simpler terms, do more activity than one is accustomed to. This will stress the body and force it to adapt.
For beginners starting cardio exercise, the article mentions that one of the first things that happens is an increase in blood volume. Within 24 hours of working out, blood volume can increase by up to 12 percent due to water retention, boosting the amount of oxygen that can be supplied to the muscles. After two weeks of training, peak blood volume is reached, which is typically 15 to 20 percent higher in athletes compared to sedentary individuals.
Furthermore, energy-producing structures within our cells called mitochondria become more numerous and efficient with regular exercise. This can lead to improved endurance and overall fitness levels.
The article emphasizes that getting fit doesn't have to be as hard or painful as many assume. By understanding how the body responds to exercise and pushing beyond one's comfort zone, individuals can see rapid improvements in their fitness levels. This research provides hope for those looking to get in shape and highlights the importance of consistency and gradual progression in any fitness journey.